Therefore - Crossword Clue, Answer and Explanation

I've seen this clue in the Sydney Morning Herald, The Mirror, the USA Today, the King Feature Syndicate, the LA Times, the Universal, the Newsday, The Star Tribune, the Penny Press, The Independent, The Guardian, The Telegraph, the Evening Standard, The Wall Street Journal and The Times.

'therefore' is the definition.
(synonyms)

This is the entire clue.

(Other definitions for thus that I've seen before include "In this way" , "as indicated" , "an original Christmas gift" , "It follows" , "Therefore, hence" .)

I've seen this clue in The Star Tribune, the Newsday.com, The Sun, the Evening Standard, the Universal, The Times, the Sydney Morning Herald, The Mirror, the King Feature Syndicate, the USA Today, The Independent, The Guardian, The Telegraph, The New York Times, the Penny Press, The Wall Street Journal, the Newsday, the LA Times and The Washington Post.

'therefore' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for ergo that I've seen before include "Thus" , "Consequently" , "'Cogito, ---- sum'" , "so philosopher wrote in Latin" , "It follows" .)

I've seen this clue in The Star Tribune, the Newsday.com, The Sun, the Evening Standard, the Universal, The Times, the Sydney Morning Herald, The Mirror, the King Feature Syndicate, the USA Today, The Independent, The Guardian, The Telegraph, The New York Times, the Penny Press, The Wall Street Journal, the Newsday, the LA Times and The Washington Post.

'therefore' is the definition.
('so' can mean 'consequently' or 'therefore')

This is the entire clue.

I've seen this clue in the King Feature Syndicate.

Therefore (5)